DOI: 10.1016/j.foreco.2015.12.040
Scopus记录号: 2-s2.0-84952949526
论文题名: Unearthing the roots of degradation of Quercus pyrenaica coppices: A root-to-shoot imbalance caused by historical management?
作者: Salomón R. ; Rodríguez-Calcerrada J. ; Zafra E. ; Morales-Molino C. ; Rodríguez-García A. ; González-Doncel I. ; Oleksyn J. ; Zytkowiak R. ; López R. ; Miranda J.C. ; Gil L. ; Valbuena-Carabaña M.
刊名: Forest Ecology and Management
ISSN: 0378-1127
出版年: 2016
卷: 363 起始页码: 200
结束页码: 211
语种: 英语
英文关键词: Biomass partitioning
; Forest decline
; Grafting
; Multi-stemmed tree
; Resprouting
; Vegetative regeneration
Scopus关键词: Biomass
; Economic and social effects
; Forestry
; Grafting (chemical)
; Harvesting
; Lakes
; Reforestation
; Biomass partitioning
; Forest decline
; Multi-stemmed tree
; Resprouting
; Vegetative regeneration
; Cloning
; Quercus pyrenaica
英文摘要: Slow growth, branch dieback and scarce acorn yield are visible symptoms of decay in abandoned Quercus pyrenaica coppices. A hypothetical root-to-shoot (R:S) imbalance provoked by historical coppicing is investigated as the underlying driver of stand degradation. After stem genotyping, 12 stems belonging to two clones covering 81 and 16m2 were harvested and excavated to measure above- and below-ground biomass and nonstructural carbohydrate (NSC) pools. To study root system functionality, root connections and root longevity were assessed by radiocarbon analysis. Seasonality of NSC was monitored on five additional clones. NSC pools, R:S biomass ratio and fine roots-to-foliage ratio were higher in the large clone, whose centennial root system, estimated to be 550years old, maintained large amounts of sapwood (51.8%) for NSC storage. 248 root connections were observed within the large clone, whereas the small clone showed comparatively simpler root structure (26 connections). NSC concentrations were higher in spring (before bud burst) and autumn (before leaf fall), and lower in summer (after complete leaf expansion); they were always higher in roots than in stems or twigs. The persistence of massive and highly inter-connected root systems after coppicing may lead to increasing R:S biomass ratios and root NSC pools over time. We highlight the need of surveying belowground organs to understand aboveground dynamics of Q. pyrenaica, and suggest that enhanced belowground NSC storage and consumption reflect a trade-off between clonal vegetative resilience and aboveground performance. © 2016 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/65077
Appears in Collections: 影响、适应和脆弱性
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作者单位: Forest Genetics and Ecophysiology Research Group, E.T.S. Forestry Engineering, Technical University of Madrid (UPM), Madrid, Spain; Institute of Plant Sciences and Oeschger Centre for Climate Change Research, University of Bern, Altenbergrain 21, Bern, Switzerland; Polish Academy of Sciences, Institute of Dendrology, Parkowa 5, Kórnik, Poland; Hawkesbury Institute for the Environment, University of Western Sydney, Richmond, NSW, Australia
Recommended Citation:
Salomón R.,Rodríguez-Calcerrada J.,Zafra E.,et al. Unearthing the roots of degradation of Quercus pyrenaica coppices: A root-to-shoot imbalance caused by historical management?[J]. Forest Ecology and Management,2016-01-01,363